27977551915439 has 16 divisors (see below), whose sum is σ = 33855712948800. Its totient is φ = 22569776530944.

The previous prime is 27977551915427. The next prime is 27977551915463. The reversal of 27977551915439 is 93451915577972.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 27977551915439 - 2⁴⁰ = 26878040287663 is a prime.

It is a super-2 number, since 2×27977551915439² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27977551915499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6042077 + ... + 9615705.

It is an arithmetic number, because the mean of its divisors is an integer number (2115982059300).

Almost surely, 2^{27977551915439} is an apocalyptic number.

27977551915439 is a deficient number, since it is larger than the sum of its proper divisors (5878161033361).

27977551915439 is a wasteful number, since it uses less digits than its factorization.

27977551915439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3639442.

The product of its digits is 750141000, while the sum is 74.

The spelling of 27977551915439 in words is "twenty-seven trillion, nine hundred seventy-seven billion, five hundred fifty-one million, nine hundred fifteen thousand, four hundred thirty-nine".